It's a very slow burn, but the protagonist slowly regains more of her human emotions. Rotten Aether is its sister novel--if you're reading one, it would be helpful to read the other as well. The two stories are definitely not traditional romances.
These ones meet all your requirements and are stories I'd recommend:
https://www.scribblehub.com/series/525690/bloody-ther/
https://www.scribblehub.com/series/525692/rotten-ther/
https://www.scribblehub.com/series/319994/chronicles-of-a-fallen-matriarch/...